Electric line stringing device



y 1954 F. E. DION ELECTRIC LINE STRINGING DEVICE Filed Aug. 14, 1952 4i 2 [Alva 727K- A C /r, fM/Li D/oAg a] i l h A770 flvs X July 20, 1954 F. E. DION ELECTRIC LINE STRINGING DEVICE 2 Sheets-Sheet 2 Filed Aug. 14, 1952 Il'u' II lln lll ll Patented July 20, 1954 UNITED STATES ATENT OFFICE 2 Claims.

This invention relates to an electric line stringing device.

As is known, it is an arduous and dangerous job to string an electric wire or cable over a pole at which the wire or cable subtends an angle, that is, where it deviates from a straight line.

The likelihood of damage to the cross arm, the insulating porcelain, or to the wire or cable, is more so at such a pole because of the presence of a corner pin. A corner pin is invariably used at such a pole to support the porcelain as otherwise, a wooden peg would break. The lineman stationed at the pole, while feeding the wire through the corner pin, is exposed to injury, particularly to his fingers.

The use of the invention, on the other hand, greatly facilitates the stringing of a wire or cable, eliminates the hazards "to which the lineman is exposed, reduces or eliminates the possibility of damage to the wire and cross arm, and reduces the cost of stringing since the lineman is free to come down the pole as soon as the device has been installed.

The objects of the invention generally, are to provide a novel and efiicient wire-stringing device.

A specific object of the invention is to provide a wire-stringing device which is readily applied to and removed from a conventional corner pin.

By the use of a device according to this invention, risk of injury to the lineman is reduced, fatigue is reduced, damage to the wire being strung or to the cross arm and porcelain, is eliminated, and considerable time and labor are saved.

In the drawings,

Figure 1 is an end elevation of the device,

shown mounted on a cross arm;

Figure 2 is a plan view of Figure 1;

Figure 3 is a vertical section on about line 33 in Figure 2 (the corner pin not shown); and

Figure 4 is a side elevation of the conventional corner pin shown in Figures 1 and 2, partly broken away.

Referring now by numerals to the drawings, it shows a conventional corner pin, such pin including essentionally a base portion ll adapted to rest upon a cross arm 0, and an upright curved portion or arm [2 extending laterally over the base.

The base H includes a web-like wall l3 spaced from the base proper and provided with an aperture M. The outer end of the arm I! is also provided with an aperture it. A pin [1 is lowered into the apertures and serves to hold the porcelain (not shown) in operative position. The

2 web-like wall 13 and arm I2 are formed to present an arcual or semi-circular recess 24 (see Figure n.

The wire or cable (not shown) is attached to the porcelain as by a length of wire (not shown) twisted around the cable and the porcelain, all according to the usual practice. Such a corner pin is, as already stated, used where the line subtends an angle. The corner pin or bracket is secured to the cross arm as by a bolt 32, the head of which is received in a recess iii of the base. The bracket is held in alignment or position as by a projection 30 depending from the base and received into a hole bored into the cross arm.

The corner pin or bracket thus far described is, as already stated, a conventional one.

The device of the present invention is adapt able to such a corner pin. The device is shown in its entirety as 20.

It comprises a body substantially in the form of a guide, presenting a more or less semi-circular recess 22 into which a wire or cable may be lowered through a gap or throat 23. The recess thus presents a gliding face to the wire or cable to be strung, the wire sliding lengthwise in the recess. The portion of the body defining one side wall of the recess (the right hand wall as seen in Figure 2) may be only slightly curved outwardly (see Figure 2) at its upper edge, as at 25. The portion of the body defining the opposite side wall of the recess, on the other hand, is substantially outwardly curved from one end to the other, as at 26; the upper edge defining such wall preferably extends or over-hangs inwardly as best seen at 28 (see Figure 1).

As is known, the corner pin or bracket IE is so attached to the cross arm C that the lateral force acting upon the porcelain, because of the angle subtended by the tensioned wire at the porcelain, imposes a tension on the arm 5 2 of the bracket. As seen in Figure 1, for instance, the lateral force would be in the direction of the arrow. Similarly, in stringing a wire through the corner pin, the wire exerts a force also in the direction of the arrow. Accordingly, the stringing device is such that when in operative position, the wire, when being strung, will glide or slide on the curved surface 26.

The body of the device is formed with a vertically-extending bored hub l5 through which the pin I! is adapted to pass, and by which the device is removably attached to the corner pin or bracket.

The body is also formed with two lugs l6, so laterally spaced as to lie on opposite sides of the base i I when the device is attached to the corner pin as by the pin ll, thereby preventing any substantial bodily rotation of the device on the axis of the pin.

The length of the hub I5 is so chosen that it will be accommodated easily between the base I l and the arm E2. The body of the device is also so formed, more particularly, its outside periphery is generally so curved, that it will easily be inserted sideways between the base and the end of the arm I2 and will be free to rotate on its longitudinal axis in the corner pin, rotating in the recess 24 of the corner pin.

When a wire is to be strung over or through the corner pin or bracket H) (which is already attached to the cross arm C) the lineman climbs the pole to the cross arm with the device conveniently attached to his belt, and with the end of the lead rope also attached to his belt. He now removes the porcelain (which was already attached to the corner pin), and attaches the device in the place of the porcelain. He threads the free end of the lead rope through the device and lowers the end of the rope to the ground. The lineman then descends the pole and proceeds to the next pole. After the wire has been strung and it is to be attached to the porcelain, the lineman climbs the pole and releases the device from the corner pin. He next shifts the device sideways, partly out from between the base I! and the arm I 2, and then partially rotates the device on its longitudinal axis to present the gap or throat 23 to the wire. The device is now removed and conveniently suspended from the linemans belt. The lineman now replaces the porcelain and attaches the wire thereto in the conventional manner.

What I claim is:

1. In an electric line stringing device, the combination with a corner pin having a bracket adapted to be attached to a cross arm and formed with a base and a curved arm defining therebetween a socket open at one side, of a generally circular body formed with an axial channel through which the line may be slid longitudinally as when being strung, said channel having a throat through which the line may be removed out of said body, said body having a bore, and a pin inserted through said bore for attaching said body to said corner pin, said bore being so disposed and directed that when said body is attached to said corner pin said throat is directed upwardly, and said body being adapted for axial rotation within said socket when said pin is removed.

2. In an electric line stringing device, the combination with a corner pin having a bracket adapted to be attached to a cross arm and formed with a base and a curved arm extending over said base and presenting a gap, of a body formed with an axial channel through which the line may be slid longitudinally as when being strung, said channel having a throat through which the line may be removed out of said body, said bo having a bore, and a pin inserted through bore for attaching said body to said corner pin, said bore being so disposed and directed that when said body is attached to said corner pin said throat is directed upwardly, and said body being so formed as to be inserted laterally into said gap to be attached to said corner pin by said pin.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,036,136 Menager Aug. 20, 1912 2,610,818 Ridgers Sept. 15, 1952 

